A Shot in The Arm

If someone is as cool as a cucumber, they do not get worried by anything.

Rohit walked away as cool as cucumber when he did not find his name is the selection list.

A Sea Change :

A radical and apparently mystical change

I find a sea change in Chennai in these two decades.

As Fit As A Fiddle :

Very fit and well

The doctor said, “You are as fit as a fiddle. You can go to work from tomorrow.”

As Good As New :

If something has been used but is still in extremely good condition, it is as good as new.

After the overhaul, my car has become as good as new.

A Shot in The Arm :

The expression implies a stimulus

The announcement of bonus was a shot in the arm to the labourers.

Asleep At The Switch :

If someone is asleep at the switch, they are not doing their job or taking their responsibilities very carefully.

Asleep At The Wheel :

If someone is asleep at the wheel, they are not doing their job or taking their responsibilities very carefully.

A Slice off A Cut-Loaf is Never Missed. :

The idiomatic expression is used colloquially to describe having sexual intercourse with someone who is not a virgin. This refers to loaf bread. It is not readily apparent, once the end has been removed, exactly how many slices have been taken.

As Mad As A Batter :

Means that someone is crazy or behaves very strangely.

As Mad As A Wrongly Shot Hog :

If someone is as mad as a wrongly shot hog, they are very angry.

As Much Use As A Chocolate Fire-Guard :

A fire-guard is used in front of a fire fireplace for safety. A chocolate fire-guard is of no use.

As Much Use As A Chocolate Teapot :

Something that is as much use as a chocolate teapot is not useful at all.